I'm starting the process of resurecting a 1975 R 75/6 that hasn't been on the road since 1986. I ordered fork boots from Capital BMW and received the 11 rib boots. There are 13 rib boots on the bike. Will the 11 rib boots work?

I've also rebuilt the carbs, replaced the points, plugs and condensor (originally it didn't have spark - fixed).
Still need to rebuild the master cylinder. Any suggestions on sourcing a rebuild kit?
Need to replace the front brake line. Need a source for the brake line.
Replaced the fuel lines.
Rebuilt the Karcoma petcocks today.
Many more items to accomplish...

Thank you for your replies. Technical ability to restore this bike I have. Experience with BMW motorcycles, where to buy parts and what to watch for and/or inspect, I do not have. Please keep the info coming. It is greatly appreciated. Browsing the net does not always produce results as I do not know what I do not know...